DataFlex

Set the JWS Payload from a StringBuilder

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetPayloadSb, which sets the payload to be signed from a StringBuilder.

Background. JWS (JSON Web Signature) integrity-protects a payload with a signature or MAC. The header alg names the algorithm; this example uses HMAC-SHA256 (HS256) with a symmetric MAC key.

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DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoJws
    Variant vSbPayload
    Handle hoSbPayload
    Boolean iBIncludeBom
    String sTemp1

    Move False To iSuccess

    Get Create (RefClass(cComChilkatJws)) To hoJws
    If (Not(IsComObjectCreated(hoJws))) Begin
        Send CreateComObject of hoJws
    End

    //  Set the payload from a StringBuilder.
    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbPayload
    If (Not(IsComObjectCreated(hoSbPayload))) Begin
        Send CreateComObject of hoSbPayload
    End
    Get ComAppend Of hoSbPayload "This is the content to sign." To iSuccess

    Move False To iBIncludeBom
    Get pvComObject of hoSbPayload to vSbPayload
    Get ComSetPayloadSb Of hoJws vSbPayload "utf-8" iBIncludeBom To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoJws To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Showln "Payload set."


End_Procedure